Nodejs JOIN query: formatting JSON output - mysql

Question

I'm making a pretty simple RIGHT JOIN query, but I can't format the output correctly.
Here is the Query:
connection.query({sql : "SELECT users.*, rides.* FROM users RIGHT JOIN rides ON users.id = rides.id_user WHERE users.id = ?", nestTables: '_', values : [id] }, function(err, rows){
console.log(rows);
});
This is the output I have:
[ { users_id: 52,
users_firstname: 'greg', //End first table data
rides_latitude: '50.847454', //Second table data: row 1
rides_longitude: '4.358356',
},
{ users_id: 52,
users_firstname: 'greg', //Exactly the same first table data
rides_latitude: '50.9', //Second table data: row 2
rides_longitude: '4.4',
} ]
And this is the ouput I would like to have:
[ { users_id: 52,
users_firstname: 'greg',
rides : [
{
rides_latitude: '50.847454',
rides_longitude: '4.358356'
},
{
rides_latitude: '50.9',
rides_longitude: '4.4'
}
]
}]
I tried nestTables as you can see,

Answer 1

Wrapped for legibility:
connection.query({
sql : "SELECT \
users.users_id, \
users.users_firstname, \
rides.rides_latitude, \
rides.rides_longitude \
FROM \
users \
RIGHT JOIN rides ON users.id = rides.id_user \
WHERE \
users.id = ?",
nestTables: '_',
values : [id]
}, function (err, rows) {
var result = [], index = {};
if (err) throw err;
rows.forEach(function (row) {
if ( !(row.users_id in index) ) {
index[row.users_id] = {
users_id: row.users_id,
users_firstname: row.users_firstname,
rides: []
};
result.push(index[row.users_id]);
}
index[row.users_id].rides.push({
rides_latitude: row.rides_latitude,
rides_longitude: row.rides_longitude
});
});
console.log(result);
});